From: Matt Joiner <anacrolix@gmail.com>
Date: Wed, 7 May 2025 03:59:35 +0000 (+1000)
Subject: Fix ReadAt after close on mmap span not returning
X-Git-Tag: v1.59.0~170
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=d71d8db5eb2dc18af20750acf7679e8eb92fb8d4;p=btrtrc.git

Fix ReadAt after close on mmap span not returning
---

diff --git a/mmap_span/mmap_span.go b/mmap_span/mmap_span.go
index 4ba2efdd..10bbfb67 100644
--- a/mmap_span/mmap_span.go
+++ b/mmap_span/mmap_span.go
@@ -60,6 +60,7 @@ func (ms *MMapSpan) ReadAt(p []byte, off int64) (n int, err error) {
 	defer ms.mu.RUnlock()
 	if ms.closed {
 		err = fs.ErrClosed
+		return
 	}
 	n = ms.locateCopy(func(a, b []byte) (_, _ []byte) { return a, b }, p, off)
 	if n != len(p) {